Who biopic has a surprise guest star you're really gonna wanna see

William Hartnell may be long gone, but that doesn't mean there won't be any Doctors in An Adventure in Space and Time

While most of the excitement is being siphoned off to "The Day of the Doctor," there's still the matter of Mark Gatiss' biopic of how Doctor Who (the show, that is) got started in the first place.

And while you might not have expected it, there's a cameo in this special featuring one of our favorite actors -- Matt Smith.

Why? Well, according to Gatiss, it's all about legacy.

There were certain parts of this that I’ve been thinking about for years. I always knew that I wanted to start on the day of [Hartnell's] regeneration [into Second Doctor actor Patrick Troughton] and use the TARDIS as a flashback device – because you can’t get a better one!

But then I had this idea – wouldn’t it be wonderful if Bill looks across the console and sees Matt – the Doctor!

That's just neat! Always nice to see the past connect with the present in a meaningful way. Sounds like An Adventure in Space and Time is going to be even more exciting than we thought.

Gatiss also added, tongue in cheek, that the program could be updated at any time to reflect the present Doctor.

Because Matt wasn’t there we can now crop in any Doctor we like and the film can be shown every November!

Sounds good to us. How about you?

(via Doctor Who TV)

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